How to access actions/buttons from Windows.UI.Notifications.UserNotification?

[forderud]

I'm trying to develop a custom application for displaying "toast" notifications. This application will eventually be deployed on an embedded system where the Windows desktop process (explorer.exe) is not running, which implies that "toast" messages are not displayed by Windows.

The Toast Notification listener article provides a great starting point, and have allowed me to access Windows.UI.Notifications.UserNotification objects that contains information about the owning application and textual toast content. However, I will also need to somehow access "actions" like buttons, selection boxes. text boxes and similar, but am struggling to figure out how.

Any advise on how to access "actions" when developing a Toast notification listener?